G - Physics – 01 – V
Patent
G - Physics
01
V
358/4
G01V 5/10 (2006.01)
Patent
CA 1163021
METHOD AND APPARATUS FOR CONSTITUENT ANALYSIS OF EARTH FORMATIONS ABSTRACT OF THE DISCLOSURE The composition of an earth formation is investigated by repetitively irradiating the formation with bursts of neutrons and measuring an energy spectrum of the scattering gamma rays resulting from such irradiation. The measured spectrum is thereafter analyzed by comparing it with a composite spectrum, made up of standard spectra, measured in a controlled environment, of constituents postulated to comprise the formation. As a result of such analysis, the proportions of the postulated constituents in the formation are determined. Where the measured spectrum is subject to degradation due to changes in the resolution of the detector, a filtering arrangement effects modification o. the standard spectra in a manner which provides for a more accurate determination of the constituents of the formation.
357830
Grau James A.
Hertzog Russel C.
Schlumberger Canada Limited
Smart & Biggar
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